Sojin has been a DSP trainee for 5 years and has dreamed of being a performer since she was a little girl.

Sojin was introduced as part of the Kara Project, a reality competition show where seven trainees competed for the chance to become a new member of KARA. While she didn't join Kara, she was set to join a new DSP group in the near future. After the completion of the show, she had returned back home to Daegu and had been spending her time there.